An engineering thermoplastic polymer, polyphenylene sulfide

• Used for high-heat, chemical-resistant parts

工程热塑性聚合物，聚苯硫醚

• 用于耐高温、耐化学腐蚀部件

In UK politics, an unpaid aide to a minister

• Liaises between minister and backbench MPs

英国政界中部长的无薪助理

• 在部长与普通议员之间联络沟通

A second note after the postscript in a letter or email

• Written as an additional afterthought

信件或邮件中紧随附言之后的第二条附注

• 作为额外的补充说明

In medicine, inflammation after surgical opening of the pericardium

• Causes fever, chest pain, and effusion

医学：心包切开术后发生的炎症综合征

• 可致发热、胸痛与积液

Plural of PP, especially prepositional phrase in linguistics

• Used to refer to multiple PP constituents

PP 的复数，尤指语言学中的介词短语

• 用于指多个 PP 成分